Designing Epigenetic Clocks for Wildlife Research

Area of Science:

• Ecology
• Genetics
• Conservation Biology

Background:

• Epigenetic clocks, models predicting age from DNA methylation, are increasingly used in wildlife conservation.
• Challenges exist in applying human-developed epigenetic clocks to wildlife due to unreliable chronological ages and limited tissue sampling.
• There is a need for field-specific best practices for wildlife epigenetic clock design and validation.

Purpose of the Study:

• To provide recommendations for designing and validating accurate epigenetic clocks for wildlife.
• To address challenges in applying epigenetic clocks to wildlife, including unreliable age estimates and sampling constraints.
• To support the accessible and widespread use of epigenetic clocks in wildlife conservation and management.

Main Methods:

• Development of a detailed workflow for designing, validating, and applying wildlife epigenetic clocks.
• Utilized simulations and analyses on an extensive polar bear dataset from the Canadian Arctic.
• Demonstrated construction and validation of accurate wildlife epigenetic clocks using a limited sample size.

Main Results:

• Accurate wildlife epigenetic clocks can be constructed and validated with a limited number of samples.
• The proposed workflow accommodates projects with small budgets and sampling constraints.
• The study addresses critical concerns for epigenetic clock design in wildlife research.

Conclusions:

• The developed workflow enables the creation of accurate epigenetic clocks for wildlife, even with limited resources.
• These methods are crucial for advancing the application of epigenetic clocks in wildlife conservation and management.
• The study promotes the accessible and widespread use of epigenetic clocks for ecological research and biodiversity protection.